var query=db.tb_flag.OrderByDescending(q => new { q.App_LeftDays, q.App_RegDate });
{"无法按类型“<>f__AnonymousType6`2[System.Nullable`1[System.Int32],System.Nullable`1[System.DateTime]]”排序。"}
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linq 多条件排序
var query=db.tb_flag.OrderByDescending(q => new { q.App_LeftDays, q.App_RegDate }); {"无法按类型“f__AnonymousType6`2[System.Nullable`1[System.Int32],System.Nullable`1[System.DateTime]]”排序。"}